Combined crusher and grinding mill



June 19, 1928. 1,674,434

F. GROSS COMBINED CRUSHER AND GRINDING MILL Filed March 15, 1926 2 Sheets-Sheet 1 June 19, 1928.

1,674,434 F. GROSS COMBINED CRUSHER AND GRINDING MILL Filed March 15. 1925 2 Sheets-Sheet Z $01M di 4 fdb (MM Patented June 19, 1928.

UNITED STATES FRANK enoss, or IDAHO SPRINGS, coLoRADo.

COMBINED CRUSHER AND GRINDING MILL.

Application filed March 15, 1926. Serial No. 94,782

An object this invention is to provide an improved construction for combined crushing and grinding mills.

A further object of this invention is 'to provide improved means for regulating and adjusting the spacing of opposed grinding faces in a grinding mill.

A further object of this invention is to provide improved means for 'conj unctively actuating crushing elements and grinding elements in a grinding mill. v

A further object of this invention is to provide an improved construction for combined crushing and grinding mills wherein elements sub'ec t to rapid wear may be easily removed and replaced.

Another object of this invention is to provide means for actuating oscillating screens or tables mounted for use with a grinding mill. v

My invention consists in the construction, combination and arrangement of elements hereinafter set forth, pointed out inmy claims and illustratedbv the accompanying drawings, i rrwhich Figure 1 is a side elevation of my, complete machine. Figure 2 is a plan .VieW thereof. Figure .3 is a rear endelevation ofthe machine as shown in F igures l and 2 and Figure his a vertical section of the axial line of the machine, certain parts being omitted. M a

In the construction of the machine as shown, the numeral .10- indicates, generally, a main frame or support, said frame being T-shaped in plain and comprisingfbases adapted .to be secured 01, a foundation, risers extending upwardlyfrom .saidbases, webs connectingsaid risers' and such flanges, ribsor other. strengthenif and bracing elementsas may be desired. %he frame .lOmay be formedin one .iece bynioulding or may consistof a plur' ity of sections formed in any desired manner andrigidlysecured one to anether .to produce anon-y'ieldingiand permanently aligned support.- H Risers extend upwardly from .thebases at the head or forwardend,of the frame. 10 and converge to form a journal bearing 11. A similar journal bearing 12 is formed on the riser at the tail or rear end-ofthe main frame, said bearings 11 and bein .inaxial alignment longitudinally of the rame. A shaft -13 is rovided withnon friction,devicessuch {i 1 Le? be rings 1 .v a d i m unt d io rotation in the journal bearings 11 and 12. The shaft 13 is formed w-i'th a threaded portion 16 -intrm'ediate its ends, an end portion of reduceddiameter, splines 17 adjacent the reduced end portion and a splined'bore 1S inthe said lesser end. I A plate or' disc 19, somewhat thicker in its central portion than at i ts periphery, is mountedon the; shaft 13 adjacent thebearing 11 with the plane face said disc to the rear and "at right. angles to the axis of the ,shaftamd isfke'yed or otherwise secured to shaft for rotation therewith. A spider 'gear 20, of slightly larger diame'terthan disc 19, ;is mounted intermediate. the bearing 11 and disc '19 concentric with, said ,discf' a'nd is secured thereto by means of 'bolt's or screws 21,pa'ss ing through armson thegeargo and engag- .in in the disc 19. A shaft-22 is jour'na'le'd ow, to one side of all el ,-,t o the shaft 13 in bearingsf 'eirten i o itwardly rem risers of the fra, e lqanfn i 'n.io n 23 is keyed or otherwise secured to the shaft 22 intermediate its. beariii s' in position to m h bh s a 20; sh fls af f rt prov de w a. t l 'whl p l ey '24 seclli'edfthereto and adapted to receive power o a y outside S c and ans 'itthrough ,gh shaft 2% pinion 23,- gear. .20 and disc 19 'to' the end bf'rotatin the shaft disc or plate Qd isf rmed 13. A stationary with an annular. flange at angles to its plane face and is secured to the transverse web of the frame 10, eoncentric'with a-nd .in olpp'ositio'n t' o the discf'19, by ,means of bolts or screws 26, the, central oi tion of said disebeing apertured for the nee rotation of t-he'shaft-13 and'being' formed with a- 'hub adaptedto extend rearwardly through the supporting Web,the rear face of said hub hejing' provided w'ith a n annular ball race concentric with the shaft A sleeve 27,

formed with an enlarged e (1 portion, surr n the -$hafb13 tb ie l ia o t s .2 1 fid sl nte hallythr d "mess the threaded p f't' qn95.5 16" h fiit e l a s end of said sleeve" Leis-g adjacent. the. hub of the disc and'jbeing r'ovided with an annular ball ra'ce 'adapte to register with the race said hub. Balls 28 are mounted in the races between thesleeve 27 and the disc 25 to the end that the sleeve27 may be rotated with the shaft 13 while thefriction. between said sleeve and the hub of the 2,5 is minimized the thrust,'bearing thus provided. The sleeve 27 is further provided with flattened exterior faces or other tool engaging means for rotating said sleeve relative to the shaft 13, such rotation serving to displace the sleeve axially of the shaft and permit adjustment of the spacing between the discs 19 and 25. A jam nut 29 is threaded on the shaft 13 adjacent the smaller end of the sleeve 27 and serves to lock said sleeve in its adjusted position. The transverse web of the frame 10 is es:- tended upwardly along the rear face of the disc to form counterpart arms 30, 31 on either side of the median line of the machine and flanges 32, 33 diverge upwardly and extend rearwardly from said arms to form sides of a hopper. Journal bearings 34, are formed on and extend rearwardly from the arms 30 and 31 respectively, near the base of the flanges 32 and 33 and a shaft 36 is mounted for rotation in said bearings spaced from and parallel to the disc 25 and above and at right angles to the shaft 13. A crusher jaw 37 is mounted on the shaft 36 between the flanges 32 and 33 and is provided with teeth 38, triangular in crosssection, seated in dovetailed slots in the face of said jaw. The rear face of the disc 25 is thickened between the flanges 32 and 33 and is likewise provided with dove-tailed slots adapted to receive removable and re placable teeth 39 similar to the teeth 38. Arms 40. 41 are formed on and diverge upwardlv from the main frame 10 forward of the bearing 12, said arms terminating in journal bearings 42 and 43, respectively, above and at either side of the shaft 13. A worm gear 44 is formed with counterpart crank-pins and throws 45, 46 and is mounted for rotation about its axis 47 in the bearings 42 and 43 between the arms and 41. Spaced parallel arms 48. 49 are formed on and extend rearwardly from the jaw 37, each of said arms being formed with an elongated yoke on its rearward end adapted to embrace one of the crank-pins on the worm gear 44 to the end that rotation of said Worm gear will cause said arms to move through an arc vertically and thus move the jaw 37 about its mounting on the shaft 36 into and out of engagement with the face of the disc 25. A worm 50 is mounted on the shaft 13 and engaged for rotation therewith by means of the splines 17, said worm also engaging the worm gear 44 and rotating said gear when and as the shaft 13 is rotated. Each of the discs 19 and 25 is provided with grinding or attrition plates 51 secured to the plane faces of said discs by means of bolts or screws (not shown). said plates 51 being each divided along a diameter for ease in removing and replacing and being each of greater thickness at its periphery than at its center, so that, said plates being opposed, the separation between the grinding faces is greater near the shaft 13 and becomes less radially therefrom. A throat 52 is formed in the disc 25 and leads forwardly and downwardly from the bottom of the crushing hopper to the space between the grinding plates adjacent the shaft 13, to the end that the crushed material may be gravity fed from the hopper to the grinding plates. A shaft 53 having a splined portion, a threaded portion and a bevel gear is mounted in the splined bore 13 in the end of the shaft 13 and is adjusted axially of said shaft by means of a nut 54 threaded on the shaft 53 and bearing against the end of the shaft 13. Brackets 55, 56 are secured to the rear riser of the main frame 10 and a shaft 57, inclined somewhat to the vertical, is mounted for rotation in said brackets. The upper end of the shaft 57 is provided with a bevel gear 58 adapted to mesh with the bevel gear on the shaft 53 and the lower end of the shaft 57 is pro vided with a crank-arm 59. Oscillating tables or screens 60 are mounted beneath the discs 19 and 25, one end of said tables or screens being pivotally suspended from the main frame 10 by a hanger bar 61, the hanger bar 61 and crank-arm 59 being connected by a rod 62 so that rotation of said cranlcarn oscillates said hanger bar about its pivot and thereby shakes or oscillates the devices connected to said hanger bar. A. discharge throat or funnel 63 may be attached to the bottom of the disc 25 to re ceive the ground material and direct its discharge as desired.

In the operation of my device power is applied to the belt pulley 24 rotating the shaft 22 and pinion 23 which in turn drives the gear 20, disc 19 and shaft 13. The worm 50 turns with the shaft 13 and drives the worm gear 44, the direction of rotation being such that the thrust from the worm is for ward against the bearing balls 28. The worm gear 44 actuates the crusher jaw 37 through the crank-pins and arms 48 and 49 so that material fed into the hopper is crushed and broken to a size to permit of its passage through the throat 52 to the space between the attrition plates of the moving disc 19 and the stationary disc 25 where it is ground progressively until of a size to pass out between the circumferential edges of said discs. The spacing of the discs 19 and 25 determines the degree of fineness of the grinding and is controlled by adjustment of the sleeve 27 relative to the shaft 13. an axial adjustment of the shaft 53 relative to the shaft 13 by means of the nut 54 being made to preserve the meshing of the bevel gears actuating the oscillating tables or screens whenever the spacing of the discs is altered.

It is obvious that many mechanical and structural modifications may be made of the machine as illustrated from the spirit of my Wish to be understood as limiting myself only to the scope of the appended claims.

I claim as my invention-- 1. A combined crusher and grinding mill con'i 'irising a main frame, a shaft horizontally disposed and mounted for rotation in said frame, vertically-disposed grinding means concentric with -aid shaft and rotatable therewith in opposition to a xerticallydisposed grindingsurface secured to said frame. means for rotating said shaft and grinding means and crushing means fixed to said frame adjacent the grinding means and olicralde from said shaft.

A combined crusher and grinding mill Without departing invention, hence I M. A3 compri ing a main frame, a shaft horizontally disposed and mounted for rotation in said frame, opposed, adjustably spaced vertically-disposed grinding surfaces concentric with said shaft, one of said .riaces being secured to said shaft and rotatable thereby, means for adjusting the spacing of said surfaces, crushing means fixed to said frame adjacent said grinding surfaces and means on said shaft for operating said crushing means.

3. i combined crusher and grinding mill comprising a main frame, a shaft llOl'iZOlltally disposed and mounted for rotation in said fran'ie, a disc vertically-disposcd concentric with said shaft and rotatable therewith, means for rotating said shaft and disc, another disc opposed to and concentric With the first disc and fixed to said frame, stepped grinding surfaces removably and replaceably secured to both of said discs, means comprisii'ig a threaded sleeve on said shaft for adjusting the spacing of said grinding surfaces. crushing mean; 'arried by the st:- iiouar c disc and the main frame and means carried by said shaft for actuating said crushing means.

4. In a ma hine of the character described, a frame. a shaft horizontally disposed and mount-"d for rotation in said frame. grinding means carried by said frame and haft, a thrust sleeve threadedly engaging said shaft for varying the spacing of the grinding means, a crushing element pivotally mount ed on said frame and means on said shaft for actuating said crushing element.

5. [n a machine of the character described, a frame. a shaft horizontally disposed and mounted for rotation in said frame, a stationary di c secured to said frame concentric with said shaft, a disc secured to said shaft spaced from and rotatable relative to said stationary disc, stepped grinding surfaces removably and replaceably mounted on said discs, said surfaces being of less thickness at their centers than at their edges and opposed so that their centers are more Widely spaced than their dges, together with a thrust siecve threadedly engaging said shaft for adjusting the spacing of said surfaces.

(3. In a machine of the character described, a frame, a disc carried by said frame, a crushing clement pivotally mounted on said frame adjacent said disc, removable and replaceable teeth carried by said crushing element in opposition to removable and replaceable teeth carried by said disc, a shaft concentric with said disc and means on said :hu ft for actuating said crushing element.

'1'. in a machine of the character described having a frame, a shaft mounted for rotation in said frame and spaced grinding means carried by said shaft and frame, a crushing clement pi votally mounted on said frame adjacent the grinding means, yoked arms on said crushing element, a gear mounted for rotation in said frame, cranks on said gear engaging said arms and removable and replaceable means carried by said shaft for engaging and actuating said gear.

8. in a machine of the character described, a frame, a shaft mounted for rotation in said frame, a grinding element rotatable with said shaft relative and in opposition to a grinding element fixed to said frame, means on said shaft for spacing said grinding elements adjustably. crushing means carried by said frame and fixed grinding element and operable from said shaft and a passage through said fixed element connecting said crushing means with the grinding surfaces.

Signed at Idaho Springs, in the county of Clear (Jreek and State of Colorado this 9th day of March, 1926.

FRANK GROSS. 

